Sand-ramming machine.



H. E. ROGERS & H. B. HARLOW.

SAND HAMMING MACHINE. APPLICATION FILED NOV. 22, 1917.

M'temed Apr., ,23, 191@ H. E. ROGERS & H. B. HARLUVV.

SAND RAMMING MACHINE.

APPLICATION FILED N0v.22,19|7.

192mg., Patented Apr. 1918.v

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SllND-BAMMLNG MACHINE.

To au whom t may concern:

Be it knowntbat we, HARRY lll. Boones a nd HARRY l Hixniw, ,citizens of the United States residing, Louis, in the State of Missouri, and at ton, in the county ofllvladison and State of Illinois, have invented a new and useful lmprovement in tland-llamming Machines, of which the following a specification.

Our invention relates to a machine specially adapted sand into a mold for castings, whereby ram- Ining the. sand by hand `is obviated and its compactncss and homogeneity insured and time and'labor saved; also applicable -for cleaning castings and metalplates,` 4etching' glass, or for. coat-ing surfaces with cement mixtures, spraying paint, or for any other purpose acooniplishable by its principle of operation. y

lt consists in features of novelty as hereinafter described and claimed, reference being hadv to ,thoaccompanying drawing forming part of this specification, Whereon;

Figure'l, is a side elevation of our improved sand ramming machine; Fig. 2, a detailed View ,to enlarged scale of the rollers and their appendages forming parts of our invention as seen in `Fig. '1 (omitting the front portion of their inclosing screen), and Fig. 3, a horizontal section through the inaT chine on line 3,' 3, in Fig. y2 showing the rollers and their appendages in top plan view. -g

r Like letters-and numerals of reference de.

note like parte in all the ures.

Our invention consists ssentially of two opposite parallel revolubl'e rollers o, o', which are preferably, partly in contact circumferentially with each other and other- Wise specially constructed as follows:

From each end of the roller a which, in the present case, is preferably, arranged between the two opposite sides l of a Jframe o (see particularly Figs. 2 and 8) projects an axle 2 which is mounted in a suitable bearing 3 formed in the corresponding side l of the frame t, and on the axle 2 beyond one side l of the frame b is xed a pulley l (omitted in 2) 'l'.o the top of each side i Specification of Letters Patent.

application sied inventer 2a, 1917.

respectively, at St.A Alf.

for ramming or impclling "latented Apr. 23, illlll.,

Serial llo. 303,372.

l is fixed the lower end of a channel or other l suitable upright bar c which is of suitable height or length and secured at its upper end to the underside of a platform d on which is mounted a suitable motor e having a central shaft or axle 5, and on the shaft 5 is fixed a drive pulley 6 which connects with the pulley 4; on the axle 2 of the roller a by an endless belt 7, the Wholebeing preferably, suspended fnom an overhead framework or scaffold either by a rod 8 secured to the platform l and passing freely through an eyebolt 9 fixed to a member of the scaffold f as shown, or in any othersuitable manner, whereby the platform d with its appendages is free to swing in alldirections and the roller a. with its frame b corv l. faces 1l of the rollers a., a', being in frictional contact with each other, while the intervening or middle circumferential surface of each roller a, 11,', is formed with a series of longitudinal corrugations l2, either Wedgeshaped as shown, or of any other desired configuration, the plain surfacesl l1 of the rollers a, o', being preferably, diametrically somewhat greater than the corrugated surfaces l2 so as to f orm a space'between the` corrugated portions of the rollers a, a.

The idle roller a is preferably, axially mounted at each end in a bearing 3 formed in the lower end of a link q which is dependent from and pivoted at its upper end to the corresponding arm of a frame b which straddles the Asides l of 'the frame b, the arms 13 being hinged at their free ends to the axle 2 of the roller a and connected together at their other ends by a transverse member lll, from which projects outwardly a handle 15 whereby the frame Z with the links q and roller a can be raised or lowered about the axle 2 of miie roller a Wheni desired into horizontal central rection from the vertical line of its suspension from the scaffold f in the operation of the machine.

For maintaining the idle roller a normally in circumferential contact with the roller a. we preferably, use a spring 16 having at one end a housing 1.7 formed in each link g and at its other end opposite to the housing 17, a housing 18 formed on the inside face of the transverse member 14. TWithin the housing 18, between its inner end and the f :orresponding end of the spring 1G is a follower` 19 which is engaged by the end of a screw-bolt 20 operated from the outside of the frame Z/ whereby the compression of the spring 1G and consequent pressure of the roller a against the roller a is regulated, a further function of the spring 16 being to permit the yielding ofthe roller a when subjected to undue pressure and allowing large pieces of material. `to pass between the roll ers a, a', without damaging the machine.

From the scaffold f is suspended a chute It the upper end of which is preferably, inclosed by a ring 2l which is pivoted at two opposite points 22 (Fig. l) of its circumference to the inside of an outer ring 23 having two opposite trunnions 24 which are at right angles tothe pivotal points 22 of the inner ring 21 and journaled in brackets 25 fixed to the scaffold 7", whereby the chute L can be moved in any direction, in an. approximately horizontal plane. The chute t which opens at its lower end between the upper halves of the rollers e, a', and directly over the space between the converging corrugations l2 of the respective rollers a, a, is secured thereat to the upright bars c carrying the roller a and its frame Z), by a band 26, or otherwise, as found most suitable. Furthermore, the chute Il is preferably, made in two (or more) sections 27, 28, adapted to telescope lwith each other as shown for enabling the chute .7b to automatically adjust itself to the varying positions of the rollers a, a, about their point of suspension 9. Fixed to the frame b and adapted to be moved therewith when raised .or lowered about the axle 2, is

y y, shieldor screen 29 which incloses the lower parts of the rollers (l, 0,', whereby the latter f and the operator are protected from injury.

In operation, rotation beingimparted to the rollers a, a', by the belt 7 driven by the motor c, and to the roller a by the `trietional contact therewith of the roller d in the directions indicated by the rcspectire arrows in Fig. l, sand n@l supplied to a hopper tired to the scaffold over the mouth of the chute Il, falls by .gravity into the latter and is directed thereby into the spare between the converging eorrugations 12 of the respectivo rollers (L, a', and being seized and compacted by the corrugations 12 is impelled by the latter through the said space at an accelerated velocity and in a line tangent to the point of contact of the rollers, rz, a', and due to the momentum so caused, is solidly packed or rammed in a mold for casting. Or the same principle may be used for impellingother material in a disintegrated or liquid form in lieu of sand, into a receptacle or against a surface according to the purpose for which the machine may be applied.

We claim:

1. In a machine of the character described, two opposite longitudinally corrugated rer oluble rollers adapted to seize. and impel a continuous stream ot' material, the said rollers being axially mounted in suitable bearings and movable therewith about a common point of suspension, and meansl for changing the relative positions of the rollersr circumferentially about each other iu the plane of their revolution.

2. In a machine of the character described, two opposite longitudinally corrugated revoluble rollers adapted to seize and impel a continuous stream of material, the said rollers being mounted in suitable lmarings and movable therewith about a common point of suspension, a member adapted to carry the axle of one, of the rollers, and means fer raising and lowering the .said member 'hingewise about the axle of the other roller.

HARRY E. ROGERS. HARRY B. HARLOW. 

